Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Reexamination Certificate
1999-05-14
2001-03-27
Rosenbaum, I. Cuda (Department: 3726)
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
C029S890039
Reexamination Certificate
active
06205662
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a method of producing a built-up heat exchanger and product thereof, and more particularly to a built-up heat exchanger in which a total heat radiating surface area may be easily adjusted according to actual need in different applications.
Following the rapid development in the information industry, various kinds of electronic elements, such as chips, microprocessors, etc., all have high operating temperatures. It is therefore necessary to provide such elements with heat radiating means in the form of heat exchanging devices.
A conventional heat exchanging device includes a radiator integrally formed from a whole piece of extruded aluminum. Such one-piece extruded aluminum radiators require large amounts of aluminum material and have a high manufacturing cost. To eliminate disadvantages existing in the conventional one-piece radiator, less expensive built-up radiators have been developed. Taiwanese New Utility Model Patent Publication No. 223957 discloses a seat
2
for fixedly receiving a plurality of radiating fins
1
thereon, as shown in FIG.
1
. The radiating fins
1
are each in the form of a plate having a lower end inserted in one of a plurality of parallel grooves formed on the seat
2
. The parallel grooves include deep and shallow grooves
21
and
22
, respectively, alternately arranged on the seat
2
. The radiating fins
1
are inserted in the deep grooves
21
.
A radiator built up from the above-described radiating fins
1
and seat
2
has the following drawbacks:
1. There are fixed numbers of deep grooves
21
on the seat
2
for receiving only fixed numbers of radiating fins
1
. Therefore, the radiator so formed has limited radiating efficiency due to limited heat radiating surface area provided by the fixed numbers of radiating fins
1
. The radiator can not be adapted to applications that require a higher radiating efficiency.
2. Although the radiating fins
1
can be designed to have different heights to increase total radiating surface area thereof, the radiating fins
1
tend to move in or even separate from the deep grooves
21
if they are too high. Moreover, the heightened radiating fins
1
require a considerably large mounting space.
3. The deep grooves
21
do not provide sufficient strength for associating the radiating fins
1
with the seat
2
, particularly when the radiator formed from the radiating fins
1
and the seat
2
has an increased volume.
The present invention therefore develops a built-up heat exchanger that eliminates the drawbacks existing in the conventional one-piece radiator and the built-up radiator disclosed in Taiwanese New Utility Model Patent Publication No. 223957.
SUMMARY OF THE INVENTION
A primary object of the present invention is to provide a built-up heat exchanger formed from a seat and a plurality of superposed radiators having adjustable numbers of radiating fins formed thereon by means of punching, so that the built-up heat exchanger is adaptable to various applications having different heat radiating requirements.
Another object of the present invention is to provide a method for producing the built-up heat exchanger.
The method of producing a built-up heat exchanger according to the present invention mainly includes the steps of cutting a thermal conductive material to provide a seat in sheet form, forming at least two spaced notches on a top surface of the seat, cutting a thermal conductive material to provide radiators in sheet form, punching the radiators so that a plurality of upward extended fins and at least two downward projected and spaced ridges are formed, applying glue over bottom surfaces of the ridges of the radiators, and superposing the radiators on the top surface of the seat with the bottom-glued ridges fitted in the notches on the seat.
A built-up heat exchanger produced in the method of the present invention mainly includes a seat and a plurality of radiators superposed on a top of the seat. The seat is made of thermal conductive material in sheet form and has at least two notches formed on a top surface thereof. The radiators are made of thermal conductive material in sheet form and are punched to form a plurality of upward extended fins and at least two downward projected ridges corresponding to the two notches on the seat, such that any of the radiators may be superposed on the top surface of the seat with the at least two downward projected ridges received in the at least two notches.
REFERENCES:
patent: 1563502 (1925-12-01), Korb
patent: 5111577 (1992-05-01), Sheridan et al.
patent: 5819407 (1998-10-01), Terada
patent: 5979050 (1999-11-01), Counterman et al.
Cuda Rosenbaum I.
Pro-Techtor Inter-national Services
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